Apparatus for grinding and shaping metals



PATENTED AUG. 30, 1353. S. DARLING.

APPARATUS POR SHVAPING uLDL'[.E`[`13&LS BY GRINDING.

TH; NoRRrs Fxrsns co., wnnmcrau. D, c.

UNITED STATES PATENT OFFICE.

SAMUEL DARLING, OF BANGOR, MAINE.

APPARATUS FOR GRINDING- AND SI-IAIEING METALS.

Specification of Letters Patent No. 9,976, dated August 30, 1853.

To al iv/wm t may concern Be it known that I, SAMUEL DRLING, of Bangor,in the county of Penobscot and State of Maine, have invented certain newand useful Improvements in Grinding Apparatus for Shaping Metals, &c.,by Grinding, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, whichform part of this specification, and in which- Figure 1 represents aview in perspective of my improved apparatus for grinding and polishing;Fig. 2 a vertical longitudinal section of the same; and Fig. 3 a planhaving the stoneremoved.

In t-he accompanying drawings, a grindstone (A) is represented asmounted on a shaft which rests in bearings supported on brackets (a)attached to standards (B) which project from a frame (C), rotary motionbeing communicated to the stone by means of a pulley (D) driven by abelt. A bed is secured to the frame at one end by hinges (-7)) and atthe other rests upon an' adjustable screw (F) by means of which it israised or lowered at will. The top of this bed is fitted at either endwith a cross way (c) on which a second bed (G) is fitted and rests, andis moved laterally as may be required, the top of this second bed (G) istted with longitudinal ways (d) on which a carriage slides. Thiscarriage (H) supports an adjustable clamp plate or holder (I) towhicharticles to be dressed are clamped while being subjected to the actionof the grindstone. To prevent grit and water from washing down among themechanism a trough (J) is arranged to inclose the clamp plate (I), whichcarries off the water &c. and discharges the same at one end of themachine into a drain or other suitable conduit or receptacle.

The carriage is caused to move back and forth on the ways and beneaththe stone (A) by means of an endless chain or rope (K) which isconnected to it and passes over a pulley at one end of the upper bed (G)and is wound around and secured Yto a drum (L) at the other end, and asthis drum turns alternately in opposite direct-ions, the carriage (H) ismade to travel backward and forward. This movement of the carriage iseffected and made adjustable and self-acting by the following devices,namely: Loose ruiming pulleys (e and f) are mounted upon the shaft (M)and are turned in opposite directions by belts (g, la) a sliding clutch(g2), between the two pulleys, which is connected by a feather with theshaft,serves to throw either pulley into gear with the shaft, on whichis keyed a driving drum (h2) that is connected by a driving band (f1)with a pulley on the shaftof the chain drum (L), so that, byvputting thepulleys (e and f) into gear alternately the chain drum will be made torotate alternately in opposite directions, causing the carriage (H) tomove backward and forward. i

Adjustable brackets or toes (N N) at the side of the carriage (H) serveto reverse its motion and vary its travel; these toes slide along a rod(O) to which they are held by set screws when adjusted to the properposition. The toes alternately strike and turn a suitably formed lever(P) which as it is turned inV one. direction or the other throws thesliding clutch (g2) into gear with one or the other of the pulleys (eand f) thus reversing the motion of the belt and of the carriage (H).The range of motion of the carriage may be varied by setting the toesnearer or farther apart; and any given port-ion, long or short of thecarriage may be alternated beneath the stone to cause it to act whereverit may be required, on an article large or .small clamped to any part ofthe holding plate (I) by setting the toes (N, N) nearer to one end ofthe rod, than the other, and varying their distance apart. This facilityof change in the range of motion of the carriage, and the capability oflimiting the action of the stone to any section short or long of theclamp plate, gives this machine far greater versatility of applicationthan any other of the kind heretofore devised. A similar arrangement ofan adjustable toe (m) is provided on the opposite side of the bed (G)this toe serves to give the upper bed (G) a'lateral movement in eitherdirection along the cross-ways (c) by the following combination ofdevices; the toe (m) is set so that at the end of each return oralternate movement of the carriage (H) it strikes and moves a pinprojecting from a lever that, by means of a pawl (n) attached to itturns a ratchet wheel on the shaft of which is keyed a cam (t) thatbearing against collars in an arm (R) connected with the upper bed (G)gives to the latter the required lateral movement, a

spring serving to throw back the lever (Q) after each stroke, to theproper position to be struck again on the return movement of thecarriage. 'Ihe trough (J) is firmly secured to the top of the carriage,and within is the clamp plate or table (I) on which the article to theground is secured by means of suitable clamps or fastenings of the usualform, this inner bed (I) is hung on trunnions (w) which rest in bearingsfitted with set screws (o) to hold the table at any required angle. Forthe purpose of varying the distance of the table from the stone to meetthe requirements of the work to be done; it can be raised and lowered byturning` a Wheel (S) which turns a screw (F) that causes one end of thebed (E) to be raised or lowered and with it the several beds restingthereon.

Much facility in grinding things of varying shape, it is obvious, willbe afforded by these several movements and adjustments, the table or bed(I) may be speedily raised or lowered to adjust it to the requireddistance from the stone according to the thickness of the body to beground and to the thickness, which its surface is to be reduced; it alsoadmits of the table being set at any desired angle, horizontally, sothat if a blade with one edge thick and the other thin like a scythe,for example, is required to be ground, its uper face presents a levelsurface to the stone. The firm attachment 0f the body to the tableprevents the lateral vibrations, while the straight longitudinal run ofthe bed insures the production of an even and regular finish of thearticle operated on, all irregular scoring of whose surface isprevented, by the lateral movement of the article taking place only atthe end of the longitudinal movement of the carriage.' By this mode ofoperation, successive straight, narrow, parallel breadths of the articleto be shaped or finished are subjected to the action of the stone untilits entire surface is dressed.

The lateral feed of the body to the carriage G may be increased ordiminished as required by adjusting the toe (m) to operate the ratchetwheel (8) one or more teeth each stroke as may be required.

Vhat I claim as my invention and desire to secure by Letters Patent, is-

The combination of the holder of the article to be ground with agrindstone o1' grinding disk substantially in the manner herein setforth, so that the article and the stone will change positionsrelatively to each other during the operation in threedirections-namely: toward each other, and parallel with, and transverseto the axis of the stone.

In testimony whereof, I have hereunto subscribed my name.

SAMUEL DARLING.

Witnesses W. C. CROSBY, GEO. R. SMITH.

